Device for registering explosions



A. D. REESE.

DEVICE FOR REGISTERING EXPLOSIONS.

APPLICATION FYILED JULY 22,1918.

Patented June 15, 1920.

2 SHEETS-SHEET I.

v awe/14,1301: J Z56! 2 22 9 a e A. D. REESE.

DEVICE FOR REGISTERING EXPLOSIONS.

APPLICATION FILED JULY 22,1918.

1,343,875. Patented June 15, 1920.

r2 SHEETS-SHEET 2.

Wm in Gamma aww/wboz wit/laws 2 UNITED- sTAT ES Hanna inlnvirnfnnnsng or BISBEE, ARIZd 1\T1,

To all whom mag concern;-

Be it known that I, 'An-BA DAvm Rnnsn -a citizeriofthe United States, residing atfBisbee, in thecounty ofCochise and-Stateof Arizona haveinvented certainnew anduse-.

-the 1ine 44.of Fig. 3, and Explosions; and I do declare the .followi ng to be a full," clear, and exact description 1 of ful Improvements in Devices for Registering the invention, "such as will .enableeiothers skilled in' the :art to: which, appertains to make and use thesame. v p a I Tlns inventlon' relates to an improved de- V108 for registering explosions, and 1t re- 'jlate's more Iparticulanly to certain improvements over my device ofthi's character which is described and claimedin m'yQPatent No.

1-,264,439 dated 30,1918; 'One object of this invention is to shorten the "distance which it isinecessary :Eor the shock-receiving plate: or vibrator vto "move n ires ponse :to a shock, (for effecting a registration of the Another object is' to provide for shield- 'ing one side-of the vibrator plate aconisiderable portion of the reverberating shock forces, so as to avoidcounter pressure, or re sistance against :thefiprimary "action of the well as to register the number :of' [explosions so that the itwo'registers combine to inshaftson which these gears rotate.

exploded; i I

dicate 'whethersor not allot the charges have Another object is to render the register" controlling mechanism very sensitive, :while eliminating very delicate--relements by dis posing the pallet-controlling spring transversely'of 'th'e direction-of movement-bf the detentor pallet. 1 Y 7 Figure '1 is "ia' side: elevation, aflportionkof the tdoorbeing broken away 5502815 to disclose the winding devicezand aone eithe- -,register:indicating idevices';, f

@fFig. :2 is Fa top plan viewrof' my improved V ashock registeringvadevice, showing the 1n- -dicaitor= or iregistering device, which is set nnvrcnron sm ma nxrnosrons'. I a

I Specification of Letterslaten't. 11116 15, A plication filedluly 22, 1918. Serial No. 24s,172. l i

table to register the number of blasts or shocks which should occur a.

Fig. '5 is a: vertical sectional' -view along Referring to those drawings in detail, in WhlCh similar reference characters correspond with similar partsithroughout the several views, the device compriseswa casmg 7, reglsters Sand 9, a register driving mechanism ,10, a register controlling mech- .anism 11 ,a shockreceiving -plate12,-and correlated elements which will hereinafter-be specified. 1, a

In this embodiment of invention l lpreferafloly providelthe case 7 witha frame 13 which is secured therein and-carries the register-and the mechanism for: driving and controlling theIregisterQ. The casing 7 is provided with a'door 14 which normally. pro-' tects the interior mechanism fromidustand other. foreign matter, and a latch 'or other suitable fastening element 15- is provided for keeping the door 14 closed. By opening the I door-' access. may be had ,to a winding device 16 whereby. aspring 17 may be wound. 7 This spring-constitutes a part of the register driving, mechanism, as it transmits its "motion to the register 9 through the medium of a train of gears 18,19,205 and 21, and

' The register,controllingdevice llfcomprises a shaft .22, apallet 23 on theshaft, a toothed wheel 24, aniarm 25 ion the shaft 22, a second arm :QGJ-onsaid shaft '22,"a spring 27 connected tothe arm 26;and to an elementofthe frame 1-3,=a-nd a reciprocative member or rod 28,-the' latter having one end pivotally connected, to the arm 25'- and having its other end secured to the central part 'of the plate l2'and supporting the latter; The "intermediate.portionk-ofthe rod28 is. slid- .able'in a bearing element="28" :wvhich constitutes alpar-t of the frame13, the "outer. end portion of the rod 28 extending horizontally; throughan; aperture inthecasing 7. Al- 1 7 though the indicatordriuing mechanism and. a portion of the indicator controlling mech "anism isidentical with that o f; my; former patent, it is hereby described in detail to prevent the necessity for referringto said former patent in order to gain a perfect understanding of the construction and operation of this improved device.

Register 9 consists of a dial 29 provided with any desired number of .graduations, which are indicated by the numerals thereon, and an indicator or indicating finger 30 which is mounted on a shaft 31, this being the shaft on which the gear wheels 21 and 24 are mounted; and it will be seen, therefore, that the spring. 17 continually tends to turn the indicating finger 30 through the medium of the train of gearing and shafts; while the controlling device 11 prevents the turning of the finger 30 except when the pawl or pallet 23 is swung or rocked so as to disengage one of its detents with the wheel 24 and allow 'this wheel to move a step and then be stopped by the other detent of the pallet 23, such movement of the pallet being effected by means of a shock which forces the plate 12 toward the easing 7, thereby moving the rod 28 inward so as to rock the shaft 22 against the tension of the spring 27. As soon as the plate 12 is relieved from the force of the shock, the spring 27 returns it, through the medium of the elements 26, 22 and 25, to the normal position shown in Figs. 3 and 4:. This com bined inward and outward movement or reciprocation of the rod 28 has now caused the finger 30 to indicate that one shock or blast has occurred, and this movement or reciprocation is repeated with each subse quent blast or shock, so that the register 9 shows at a glance how many shocks have occurred.

The manually settable register 8 is similar to the register 9, exceptthat' it is not connected with any operating or controlling mechanism, and may be provided with any suitable means, for instance, such as indi cated at 32 whereby its finger may be turned to register with the numeral which indicates the number of shocks which should occur; that is, the number of separate charges of a series which are to be exploded. Register 8 effectually prevents error which would otherwise result from forgetfulness and thereby prevents great danger and the loss of life which so often occurs because of the erroneous belief that'all of the intended blasts have occurred. By carefully setting the register 8 to correspond with the number of shocks which should'occur, and then properly locating and positioning this device with relation to the blasts, and afterward comparing the registration on the reg1ster 9 with that of the register 8, it may 'be determined at a glance whether or not all of theshocks or blasts which should have occurred, have occurred; and if it'is'found that the number indicated by the register 9 is less than that which is indicated by the register 8, it is known that one of the blast charges has not yet exploded, and the workmen remain at a safe distance until such charge or charges have exploded, or until sufficient time has elapsed to assure the workmen that such blast charge or charges will not explode.

By the construction of the controlling mechanism which is clearly disclosed in Fig. 4, a considerable portion of the plate 12 is shielded by the adjacent surface of the casing 7, so that the reverberating shock force of-one blast or shock will not counteract the efl'ect of a subsequent shock in mov-- ing the plate 12 toward the casing; Moreover, because of the shortness of the arm 25, only a slight movement of the plate12 is required to rock the pallet 23 sufficiently to effect the step by step movement of the wheel 24:. The combined weight of the rod 28 and the plate 12 effects a frictional engagement of the rod with the bearing 28;

and this prevents undue vibration of the pallet so that all danger'of registering excessively is avoided.

Although the spring 27 is formed of wire sufliciently heavy to withstand the effects of damp air and gas of mines, tunnels, etc., it

' is sufiiciently sensitive to yield under the comparatively slight pressure which results from explosions at a distance from the plate 12. This is true because of the position of the spring with relation to the shaft or locking member 22, as shown in Fig. 4, where it will be seen that this spring extends substantially radially with relation to the shaft 22 and pulls in the radial direction, that is, its pull is exerted along a line which extends transversely of the path of movement of the upper and lower detents of the pallet 23. p

Although I have described this embodiment of my invention very specifically, it

is not intended to limit myinvention to these exact details of construction and arrangement of parts, but I am entitled to make changes without departing from the inventive idea disclosed in the foregoing description and following claims:

What I claim as my invention is:

1. In a device for registering shocks resulting from explosions, a plate moinited'for movement and adapted to be moved by the shock forces and to control the registering operations, and: shielding means toshield one side of said plate against at least a part of the shock forces so as to avoid counter pressure, substantially as described.

2. In a device-for registering" shocks resulting from explosions, a plate mounted ing operations, and a, casing to il'lclose a register operating mechanism andisupport the said plate, said casingalso constituting ashielding meansto shield onesid of said plate against at least, a part'of the shock forces soas to avoid counter pressure, substantially as described. V,

In testimoilywhereof I have he reunto sefi Q my hand '7 V ALBA DAVID REESE. Witn sses: f I

J. A. KEMPTON, V CHAS. G. Bnooxs. v 

